The MF40101V1-1000U-G99 is a 40x40x10mm fan produced by Sunon. It has a 12V DC voltage rating, a 1000 RPM speed, and a Noise Level of 30.5dBA. It features a 4-pin Pulse Width Modulation (PWM) connector and a dual ball bearing system for durability. It is designed for high efficiency, low power consumption, and quiet operation. It is RoHS compliant and UL recognized.